Simulation Investigation on Particle Damping for its Characteristic of Loss Power in Vertical Excitation

Duan Yong Chen Qian Zhou Hongwei

Journal of Vibration and Shock ›› 2009, Vol. 28 ›› Issue (2) : 28-31.

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Journal of Vibration and Shock ›› 2009, Vol. 28 ›› Issue (2) : 28-31.
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Simulation Investigation on Particle Damping for its Characteristic of Loss Power in Vertical Excitation

  • Duan Yong Chen Qian Zhou Hongwei
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Abstract

ABSTRACT: The characteristic of energy dissipation for particle damper was investigated by simulation using 3-D discrete element method under harmonic excitation in vertical in this paper; the excitation level and frequency were controlled, respectively. For the excitation level, not only the acceleration amplitude was interested but the velocity amplitude and the displacement amplitude as well. As a result: the loss power depends on the excitation level and frequency. When the acceleration amplitude, velocity amplitude and displacement amplitude increase, loss power increases. When the acceleration amplitude is the same, loss power decreases with the excitation frequency increases. When the velocity amplitude is the same, loss power has almost nothing to do with the excitation frequency. When the displacement amplitude is the same, loss power increases with the excitation frequency increases. And as the excitation level increases, the percent of friction part of loss power decreases and the percent of the impact part increases. The result has been also obtained by experiment.

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particle damping DEM excitation level excited frequency loss power

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Duan Yong Chen Qian Zhou Hongwei. Simulation Investigation on Particle Damping for its Characteristic of Loss Power in Vertical Excitation[J]. Journal of Vibration and Shock, 2009, 28(2): 28-31
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